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[제3분과/구조거동/재료] CKD 치환 콘크리트의 강도 증진 해석
주은희(Joo Eun-Hi),손명수(Shon Myeong-Soo),조규일(Cho Kyou-il),차천수(Cha Cheon-Soo),한민철(Han Min-Cheol),한천구(Han Cheon-Goo) 한국구조물진단유지관리학회 2004 한국구조물진단학회 학술발표회논문집 Vol.- No.-
In this paper, estimation of strength development of concrete incorporating cement kiln dust(CKD) is discussed using logistic model under various curing temperature and W/H. Compressive strength is gained with an increase in maturity. Before reaching 840D·D of maturity, similar level of strength development is obtained regardless of CKD presence. Use of CKD has a beneficial effect on strength development of concrete at low curing temperature. Logistic model has a good agreement between measured strength and calculated strength. CKD concrete has slightly lower strength than plain concrete at same maturity. Resultant constant for estimating strength development of plain concrete calculated about 0.965 and for CKD concrete about 0.938. From the scope of the paper, effective strength control method and estimation model related to determine form removal time and protection period against frost damage at early age is provided by table 4 and Fig. 2.
주은희 ( Joo Eun-hi ),손명수 ( Shon Myeong-soo ),조규일 ( Cho Kyou-il ),차천수 ( Cha Cheon-soo ),한민철 ( Han Mm-cheol ),한천구 ( Han Cheon-goo ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.1
In this paper, estimation of strength development of concrete incorporating cement kiln dust(CKD) is discussed using logistic model under various curing temperature and W/B. Compressive strength is gained with an increase in maturity. Before reaching 840°DㆍD of maturity, similar level of strength development is obtained regardless of CKD presence. Use of CKD has a beneficial effect on strength development of concrete at low curing temperature. Logistic model has a good agreement between measured strength and calculated strength. CKD concrete has slightly lower strength than plain concrete at same maturity. Resultant constant for estimating strength development of plain concrete calculated about 0.965 and for CKD concrete about 0.938. From the scope of the paper, effective strength control method and estimation model related to determine form removal time and protection period against frost damage at early age is provided by table 4 and Fig. 2.